Troy-Bilt OG-4904 Lawn Mower User Manual


 
TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
Engine fails to start 1. Blade control handle disen
-
gaged.
2. Spark plug wire disconnected.
3. Fuel tank empty, or stale fuel.
4. Blocked fuel line.
5. Faulty spark plug.
6. Engine flooded.
1. Engage blade control handle.
2. Connect spark plug wire.
3. Fill tank with clean, fresh gasoline.
4. Clean the fuel line.
5. Clean, adjust gap or replace.
6. Wait a few minutes to restart, but
do not prime.
Engine runs erratic 1. Spark plug wire loose.
2. Blocked fuel line or stale fuel.
3. Vent in gas plugged.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Carburetor out of adjustment.
1. Connect and tighten spark plug wire.
2. Clean the fuel line; fill the tank
with clean, fresh gasoline.
3. Clear vent.
4. Drain the fuel tank and carburetor.
Refill with fresh fuel.
5. Clean air cleaner.
6. Adjust carburetor.
Engine overheats 1. Engine oil level low.
2. Air flow restricted.
3. Carburetor not adjusted prop-
erly.
1. Fill crankcase with proper oil.
2. Remove blower housing and
clean.
3. Adjust carburetor.
Idles poorly 1. Spark plug fouled, faulty or gap
too wide.
2. Carburetor improperly adjusted.
3. Dirty air cleaner.
1. Reset gap to .030" or replace
spark plug.
2. Adjust carburetor.
3. Clean air cleaner.
Excessive vibration 1. Cutting blade loose or unbal-
anced.
2. Bent cutting blade.
1. Tighten blade and adapter. Bal-
ance blade.
2. Replace blade.
Mower will not mulch grass 1. Wet grass.
2. Excessively high grass.
3. Dull blade.
1. Do not mow when grass is wet;
wait until later to cut.
2. Mow once at a high cutting
height, then mow again at desired
height or make a narrower cutting
path.
3. Sharpen or replace blade.
Uneven cut 1. Wheels not positioned correctly.
2. Dull blade.
1. Place all four wheels in same
hight position.
2. Sharpen or replace blade.
Wheels will not propel 1. Belt not installed properly.
2. Debris clogging drive operation.
1. Check belt for proper pulley in
-
stallation and movement.
2. Clean out debris.
NOTE: For repairs beyond the minor adjustments listed above, contract your nearest authorized
service dealer.
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